Re: Content Delivery Networks

["Crist Clark" <Crist.Clark () globalstar com>]

> > > On 8/10/2007 at 11:55 AM, "Patrick W. Gilmore" <patrick () ianai net>
wrote:

> On Aug 10, 2007, at 12:46 PM, John Levine wrote:
>
> > > Very interesting.  We've all heard and probably all passed along  
> > > that little
> > > bromide at one time or another.  Is it possible that at one time  
> > > it was true
> > > (even possibly for AOL) but with the rise of CDNs, policies of not 

> > > honoring
> > > TTL's have fallen by the wayside?
> >
> > I think you'll still see it in spam zombies, some of which have the 

> > DNS info
> > pre-loaded into them in order to avoid split-horizon anti-spam  
> > techniques.
> >
> > Not much we can do about that until we get sufficient backbone to
deal
> > with the zombie problem and its software enablers.
>
> Actually, I think the fact Zombies do not honor TTLs is a feature.
:)

Fast-flux my MX records to avoid spam? Throw the spammers'
technology back at 'em!

I changed some MX records in mid-July for a domain. Spam was
still flowing into the old MX hosts until I closed the firewall
25/tcp holes just today. Now just logging those zombies still
banging on the gates.
-- 

Crist J. Clark                              
crist.clark () globalstar com
Globalstar Communications                                (408)
933-4387


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